212102210 has 8 divisors (see below), whose sum is σ = 381783996. Its totient is φ = 84840880.

The previous prime is 212102203. The next prime is 212102221. The reversal of 212102210 is 12201212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 175536001 + 36566209 = 13249^2 + 6047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 212102191 and 212102200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10605101 + ... + 10605120.

Almost surely, 2^212102210 is an apocalyptic number.

212102210 is a deficient number, since it is larger than the sum of its proper divisors (169681786).

212102210 is a wasteful number, since it uses less digits than its factorization.

212102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21210228.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 212102210 is about 14563.7292614220. The cubic root of 212102210 is about 596.3690059813.

Adding to 212102210 its reverse (12201212), we get a palindrome (224303422).

The spelling of 212102210 in words is "two hundred twelve million, one hundred two thousand, two hundred ten".